Displays of restraints, torture implements, and photographs of victims taken by their captors, the Khmer Rouge, at S-21 now known as the Toul Sleng Genocide Museum in Phnom Penh, Cambodia. Once a school, S-21 was converted into a prison by the Khmer Rouge for the interrogation, torture and killing of anyone suspected of being a threat to the regime. Many victims, after their forced confessions, were taken to the nearby Killing Field of Choeung Ek where later 129 mass graves were found of which 86 were excavated. Upwards of 20,000 People were killed by bludgeon, knife, and poison at Choeung Ek, at times at a rate of 300 per day. An estimated 3 million people lost their lives, killed or starved, during the reign of the Khmer Rouge from 1975-1979.